"2. You say "What I find interesting is how right after WWII was when we started seeing the first UFO's over America."

Actually, people had been reporting UFO's for hundreds of years; it was simply that they were reported as "visions", "spirits", or "ghosts". It wasn't until the 20th century when our emerging technology led us to understand that there actually is a potential for extra-terrestrial life, that we ascribed intelligences to these same phenomena. --- Duncan Kuntz"

Duncan you are off here by several centuries, in Europe one of the earliest to propose a extra-terrestail orgin of the "flying hats" of his day was none other than Gailieo.